ABC News(NEW YORK) -- Fellas, would you grow a mustache for Kate Upton?

The Sports Illustrated cover girl is on a mustache mission for November to help raise awareness about men’s health issues.

“It started in Australia and I think it was kind of guys being guys and joking around. They were seeing how long they can grow out their hair,” Upton, 21, said Thursday on ABC’s GMA LIVE! “But it’s for such a great cause.”

The month-long event, dubbed Movember, urges men to sign up to grow mustaches for men’s health charities. Clean-shaven men grow and groom their "Mo," short for mustache, and ask friends and family members to contribute.

Women can take part too, hence Upton’s involvement as a “Mo Sista,” or a female supporter of the mustache cause.

“I think that it’s fun. It’s a great month and it’s for a good cause,” said Upton, who’s the captain of Team Gillette, a corporate partner on the project that will also donate to the cause. “You have that excuse [to grow a mustache]. You can try something new.”

On GMA LIVE!, Good Morning America’s daily Web show, the supermodel offered some style tips for guys embarking on the Movember challenge.

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“I’ve never had a mustache, so I’m not the expert,” Upton joked. “I say keep it trim. Being a part of Gillette, I think we’re thinking not just grow it out, but keep it a little more trim.”

If you’re looking for mustache inspiration, look no further. Upton rated a few iconic celebrity mustaches in the studio from Jeopardy! host Alex Trebek’s to Lionel Richie’s to her hands-down standard: Tom Selleck.

Does this mean Upton’s man must have a mustache like Selleck’s? “Well, it’s for a good cause, so maybe anybody,” she said.